They are easy to assemble, fast and painless. 4pcs x 70360 Locking Caster with Insert. BBQ locking casters for Summit Series Gas Grills 2007-2011, for summit e-420, summit e-450, summit e-470, summit e-620, summit e-650, summit e-670, summit s-420, summit s-450, summit s-460, summit s-470, summit s-620, summit s-650/ 660/ 670 grill parts.
